Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 7 29.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/30/2019   22:38:56   (   0.03,-137.19) (   0.04,-137.11)    9.41                80
 08/02/2019   10:38:54   (  -0.04,-137.17) (   0.08,-137.75)   65.37                80
 08/03/2019   10:22:39   (  -0.04,-137.16) (  -0.91,-133.17)  454.62                80
 08/04/2019   22:41:39   (   0.04,-137.14) (  -0.24,-138.41)  144.69                80
 08/05/2019   22:25:23   (   0.04,-137.13) (   0.75,-133.84)  375.16                80
 08/07/2019   10:44:17   (  -0.04,-137.12) (   0.37,-139.06)  220.51                80
 08/08/2019   10:28:01   (  -0.04,-137.10) (  -0.62,-134.48)  298.92                80
 08/09/2019   22:47:01   (   0.05,-137.07) (  -0.52,-139.72)  301.57                80
 08/10/2019   22:30:46   (   0.05,-137.05) (   0.47,-135.14)  217.50                80
 08/12/2019   10:49:38   (  -0.06,-137.03) (   0.71,-140.35)  379.28                80